val length : string -> int

Return the length (number of characters) of the given string.

val get : string -> int -> char

String.get s n returns character number n in string s. The first character is character number 0. The last character is character number String.length s - 1. Raise Invalid_argument if n is outside the range 0 to (String.length s - 1). You can also write s.[n] instead of String.get s n.

val set : string -> int -> char -> unit

String.set s n c modifies string s in place, replacing the character number n by c. Raise Invalid_argument if n is outside the range 0 to (String.length s - 1). You can also write s.[n] <- c instead of String.set s n c.

val create : int -> string

String.create n returns a fresh string of length n. The string initially contains arbitrary characters. Raise Invalid_argument if n < 0 or n > Sys.max_string_length.

val make : int -> char -> string

String.make n c returns a fresh string of length n, filled with the character c. Raise Invalid_argument if n < 0 or n > Sys.max_string_length.

val copy : string -> string

Return a copy of the given string.

val sub : string -> int -> int -> string

String.sub s start len returns a fresh string of length len, containing the characters number start to start + len - 1 of string s. Raise Invalid_argument if start and len do not designate a valid substring of s; that is, if start < 0, or len < 0, or start + len > String.length s.

val fill : string -> int -> int -> char -> unit

String.fill s start len c modifies string s in place, replacing the characters number start to start + len - 1 by c. Raise Invalid_argument if start and len do not designate a valid substring of s.

val blit : string -> int -> string -> int -> int -> unit

String.blit src srcoff dst dstoff len copies len characters from str